<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title></title>
    <script>
    /*let show=function (a, b){
      alert(a+b);
    };*/

    let show=(a, b)=>{
      alert(a+b);
    };

    show(12, 6);
    </script>
  </head>
  <body>

  </body>
</html>
